drivers: Add basic LoRa driver support

Add basic driver support for LoRa.

Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>

drivers/CMakeLists.txt

@@ -37,6 +37,7 @@ add_subdirectory_if_kconfig(ps2)
 add_subdirectory_if_kconfig(kscan)
 add_subdirectory_if_kconfig(video)
 add_subdirectory_if_kconfig(eeprom)
+add_subdirectory_if_kconfig(lora)
 
 add_subdirectory_ifdef(CONFIG_FLASH_HAS_DRIVER_ENABLED flash)
 add_subdirectory_ifdef(CONFIG_SERIAL_HAS_DRIVER serial)

drivers/Kconfig

@@ -9,6 +9,8 @@ source "drivers/bluetooth/Kconfig"
 
 source "drivers/ieee802154/Kconfig"
 
+source "drivers/lora/Kconfig"
+
 source "drivers/console/Kconfig"
 
 source "drivers/ethernet/Kconfig"

drivers/lora/CMakeLists.txt

@@ -0,0 +1 @@
+#nothing

drivers/lora/Kconfig

@@ -0,0 +1,26 @@
+#
+# Copyright (c) 2019 Manivannan Sadhasivam
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+# Top-level configuration file for LORA drivers.
+
+menuconfig LORA
+	bool "LoRa drivers"
+	help
+	  Include LoRa drivers in the system configuration.
+
+if LORA
+
+module = LORA
+module-str = lora
+source "subsys/logging/Kconfig.template.log_config"
+
+config LORA_INIT_PRIORITY
+	int "LoRa initialization priority"
+	default 90
+	help
+	  System initialization priority for LoRa drivers.
+
+endif # LORA